It’s-a not you, it's-a me, Mario: Why Nintendo’s heroes and princesses aren’t going steady

Peach just wants to be friends. Like other would-be Nintendo romances, the two's relationship is officially platonic. Why?

A cosmic explosion with the force of a billion suns went unseen—until we caught its echo

Some of the universe's most extreme explosions leave behind almost no trace. The original explosion is unseen, but our observations can capture the long-lived echo it leaves behind as the shock front ...